Material Drying
9 görüntüleme
PA66 over-drying embrittlement
Sorun Belirtisi
After pellet moisture content is reduced too low, product brittleness increases instead, impact test unqualified
Neden Analizi
Over-drying (over 110℃ or over 12 hours) causes thermal oxidation, PA66 pellets yellow, impact and elongation at break decline; recycled material has higher risk due to accumulated heat history
Çözüm
①Control moisture content in the 0.1-0.2% range, do not blindly pursue lower; ②if not put into production after 8 hours, lower to 70-80℃ for heat preservation; ③shorten drying time for recycled material and strengthen verification
Temel Çıkarım
PA66 drying has over-drying risk; 0.1-0.2% is the target range, overtime heat preservation with temperature reduction is the standard handling for production handover; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!